Ag. Haerle et Ra. Haber, ULTRASONIC REAL-TIME MONITORING OF CAKE STRUCTURE DURING SLIP CASTING, Journal of the American Ceramic Society, 78(3), 1995, pp. 819-823
An ultrasonic monitoring system was developed which utilizes two longi
tudinal transducers configured in a pulse-echo mode to monitor the str
ucture of a growing slip cast cake. By applying appropriate volume con
servation equations to the planar, uniaxial casting apparatus, it is s
hown that the cake permeability and local volume fraction of voids in
a cake can be measured while casting is taking place, Values obtained
from the ultrasound measurements mere compared to traditional methods
of measuring cake permeability and cake porosity, Reasonable agreement
was found, Advantages of the ultrasound technique over traditional me
thods, as well as limitations of the technique, are discussed.